(Ajax asynchronous management background and front-end data binding plug-in source code. Using ajax in the page can make the page respond faster. By sending requests to the server asynchronously, users do not need to load the page from scratch, which improves the user experience. Type: the string defining the HTTP method, which can be GET and POST types. The default is GET; Url: the page address string to be accessed; Data: a map object or string, which is the data that needs to be sent to the server; Success: callback function. The data returned from the server will be assigned to the parameters of this callback function; JAT finally uses returnfalse; Then he suppressed the browser's tacit click behavior, because the action is executed through jQuery code.)